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Finding the Fourth Proportional to 54,576.40, 81,848.40 and 21,277.30

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Solution

The fourth proportional to 54,576.40, 81,848.40 and 21,277.30 is: 31,909.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,576.40 : 81,848.40 = 21,277.30 : x
  2. Step 2: Convert to fraction form
    54,576.40/81,848.40 = 21,277.30/x
  3. Step 3: Cross multiply
    54,576.40x = 81,848.40 × 21,277.30
  4. Step 4: Simplify right side
    54,576.40x = 1,741,512,961.32
  5. Step 5: Solve for x
    x = 1,741,512,961.32/54,576.40
  6. Step 6: Final answer
    x = 31,909.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.